.root {
    -fx-background-image: url("img/back_login.png");
}

#btnAcceder {
	-fx-background-image: url('img/icon_ok.png');
	-fx-background-repeat: no-repeat;
	-fx-background-position: left;
}

#btnSalir {
	-fx-background-image: url('img/icon_exit.png');
	-fx-background-repeat: no-repeat;
	-fx-background-position: left;
}